"Five times the difference of twice a number and three, decreased by the sum of the number and eight, equals 13."

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.